Which of these has some mechanical energy?

a: an atom

b: heat inside earth

c: a book on a shelf

d: a fire from a lit match

What do most scientists believe is leading to climate change today? a. more volcanic and earthquake activity b. rising temperatures on the Sun c. increased amounts of greenhouse gases in the atmosphere d. changes in the Earth's orbit

What types of elements are useful for dating materials?

How do scientists interpret data?

The earth is slightly flattened from a perfect spherical shape because of

What force is needed to accelerate a 800 g object at 3.5 m/s^2?

How would the moon appear from earth if the moon did not rotate?

Block B has mass 4.00 kg and sits at rest on a horizontal, frictionless surface. Block A has mass 2.00 kg and sits at rest on top of block B. The coefficient of static friction between the two blocks is 0.400.

T=2π√ (l/g) is dimensionally correct

A penny falls from a windowsill which is 25.0 m above the sidewalk. How much time does a passerby on the sidewalk below have to move out of the way before the penny hits the ground?

Show that the Newton has the units of mass times acceleration.